I am honestly befuddled by those standard temperature recommendations. I am not very experienced - I am only on my second batch of chicks raised by me (unfortunately no rooster allowed). Inspired by this thread I got a heat plate and I love it. I drape a little fleece blanket over the top and down either side to make it more cave like.You said the “HL” word!
This most recent batch started in the bathroom and were clearly too hot most of the time with a room temperature of 73 degrees F. They went under the plate every now and then but even at night were sleeping with their heads outside, and in under a week they were living on top. It wasn’t until I moved them to the garage with temperatures in the 50s that they seemed to really want their heat cave at night.
It is unfortunate for novices like me that those temperature guidelines are everywhere. I felt like I might kill my babies because the room was too cold and they didn’t want to go under the plate. Turns out they just didn’t need to be that warm and there were better things to do in life than huddle under the plate!